Guide rail structure fixed on child seat

Abstract

The utility model provides a guide rail structure fixed on a child seat, which is characterized in that the guide rail structure comprises a square shell, a guide rail and a guide rail, the inner core structure is provided with a first notch, and the inner core structure is arranged in the square shell; the button assembly is arranged on the inner core structure, and the button assembly moves through the sliding groove; the pull rod is arranged in the inner core structure, and a buckle is arranged in the middle of the pull rod; wherein the inner core structure extends out of the square shell, and the buckle extends out of the first notch to clamp the square shell and limit the movement of the inner core structure. The utility model solves the problem that the inner core structure retracts when the inner core structure extends out of the square shell.

Description

Technical Field

[0001] The utility model relates to the technical field of child safety seats, and more specifically, to a guide rail structure fixed on a child seat. Background Art

[0002] With the economic development, child seats are used more and more widely in cars, and the safety of child seats fixed on car seats has become the most important issue. The guide rail structure at the bottom of the child safety seat is connected to the car seat. When an accident occurs in the car, the inner core structure extending out of the square shell cannot be fixed and retracts into the square shell, causing the child safety seat to displace, so that the child is more seriously injured. Summary of the Utility Model

[0003] The problem solved by the utility model is how to solve the problem of the inner core structure retracting when the inner core structure extends out of the square shell.

[0004] To solve the above problems, the utility model provides a guide rail structure fixed on a child seat, including: a square shell with a chute on the side; an inner core structure with a first notch, and the inner core structure is arranged inside the square shell; a button assembly arranged on the inner core structure, and the button assembly moves through the chute; a pull rod arranged in the inner core structure, and the pull rod is provided with a buckle; when the inner core structure extends out of the square shell, the buckle extends out of the first notch and catches the square shell to limit the movement of the inner core structure.

[0005] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: a square shell is arranged outside the guide rail structure, and an inner core structure is arranged inside. The button assembly is installed on the inner core structure, and the left and right movement of the inner core structure is controlled through the chute on the side of the square shell to ensure that the inner core structure moves within a certain range, ensuring the safety and stability of the axial direction of the child seat; a first notch is arranged on the surface of the inner core structure to ensure that the buckle inside the pull rod extends out of the first notch and catches the square frame to prevent the inner core structure from retracting into the square shell, ensuring that when an accident occurs in the car, the inner core structure will not retract into the square shell due to the impact of the accident, improving the stability of the square shell and the inner core structure, and avoiding secondary displacement of the child safety seat after impact and causing secondary injury to the child.

[0006] Furthermore, a pair of sliding holes, including a first sliding hole and a second sliding hole, are arranged on two side walls of the pull rod; two positioning members connected to the inner core structure, including a first positioning member and a second positioning member, are arranged in the pair of sliding holes; wherein the first positioning member passes through the first sliding hole, and the second positioning member passes through the second sliding hole.

[0007] Technical effects achieved after adopting this technical solution: The two side walls of the pull rod are provided with a first sliding hole and a second sliding hole, saving the use space of the pull rod; a first positioning member and a second positioning member corresponding to the connection with the inner core are arranged in a pair of sliding holes, ensuring that the pull rod is stably fixed on the inner core structure during operation, and preventing the pull rod inside the inner core structure from disengaging from the inner core structure when the external force suddenly increases, resulting in the failure of the guide rail structure on the child seat.

[0008] Further, the first positioning member and the second positioning member pass through the buckle to limit the movement of the buckle.

[0009] Technical effects achieved after adopting this technical solution: The surface of the buckle inside the pull rod has through holes for the first positioning member and the second positioning member to pass through, restricting the buckle from moving along with the movement of the pull rod; the first positioning member and the second positioning member pass through the buckle and are controlled within the first sliding hole and the second sliding hole, restricting the relative movement of the buckle within the first sliding hole and the second sliding hole.

[0010] Further, a pressing piece is arranged in the two side walls of the pull rod, and the pressing piece controls the buckle to extend out of the first notch.

[0011] Technical effects achieved after adopting this technical solution: The pressing piece arranged in the two side walls of the pull rod is elastic, with one end arranged on the pull rod and the other end in contactless state, pressing against the buckle, for controlling the extension or retraction of the buckle. Such a setting saves the space of the pull rod.

[0012] Further, a pair of sliding holes, including a third sliding hole and a fourth sliding hole, are arranged on the two side walls of the pull rod near one end of the button assembly; two positioning members connected to the inner core structure, including a third positioning member and a fourth positioning member, are arranged in a pair of the sliding holes; wherein the third positioning member passes through the third sliding hole, and the fourth positioning member passes through the fourth sliding hole.

[0013] Technical effects achieved after adopting this technical solution: A pair of sliding holes are arranged on the two side walls at the end of the pull rod, saving the use space of the pull rod; two positioning members corresponding to the connection with the inner core are arranged in a pair of sliding holes, ensuring that the pull rod is stably fixed on the inner core structure during operation, and preventing the pull rod inside the inner core structure from disengaging from the inner core structure when the external force suddenly increases, resulting in the failure of the guide rail structure on the child seat.

[0014] Further, a limiting plate is arranged between the two side walls of the pull rod near one end of the button assembly. A fifth sliding hole is arranged on the limiting plate, and the third positioning member and the fourth positioning member pass through the fifth sliding hole. A protrusion and a limiting groove are arranged on the limiting plate; a convex column is arranged between the two side walls of the pull rod near one end of the button assembly, and the convex column cooperates with the limiting groove.

[0015] Technical effects achieved after adopting this technical solution: The limiting plate is arranged between the two side walls at the end of the pull rod. Two positioning members pass through three sliding holes at the end of the pull rod to limit the moving space of the limiting plate and ensure the radial stability of the limiting plate. The convex column and the limiting groove cooperate to control the limiting plate, and the convex part at the upper end of the limiting plate is controlled by the limiting plate to move accordingly, ensuring that the pull rod completely controls the movement of the limiting plate.

[0016] Further, the inner core structure includes: an inner core housing provided with a second notch and arranged in the square shell; an inner core arranged in the inner core housing; and a convex part protruding out of the second notch.

[0017] Technical effects achieved after adopting this technical solution: A second notch is provided at the top of the inner core housing for the convex part to protrude out, clamping the square shell and improving the safety and stability of the child safety seat.

[0018] Further, the limiting plate includes a compression spring arranged between the limiting plate and the inner core.

[0019] Technical effects achieved after adopting this technical solution: The compression spring further restricts the movement of the limiting plate, preventing the convex head on the limiting plate from protruding out of the second notch when the inner core structure moves, and improving the stability control of the limiting plate.

[0020] Further, the button assembly includes: a torsion sleeve arranged on the inner core housing; a button arranged in the torsion sleeve, with the button connected to one end of the pull rod close to the button assembly; and a torsion cover arranged on the torsion sleeve.

[0021] Technical effects achieved after adopting this technical solution: In the button assembly, the button and the torsion sleeve control different components respectively to avoid confusion of control components and interference with the movement of other components.

[0022] Further, a top plate is arranged at one end of the pull rod far from the button assembly. The top plate passes through the pull rod and abuts against the latch. A tension spring is arranged on the latch, and the other end of the tension spring is connected to the barb at the front end of the pull rod.

[0023] Technical effects achieved after adopting this technical solution: The latch cooperates with the components in the rear seat of the car. When the latch is locked, the child safety seat is fixed on the seat, improving the stability and safety of the child seat in case of emergencies.

[0024] In summary, each of the above technical solutions of this application may have one or more of the following advantages or beneficial effects: i) The buckle inside the pull rod ensures that when the inner core structure extends to the farthest distance out of the square shell, the buckle pops out and engages with the edge of the square shell, preventing the inner core structure from retracting and improving the stability of the child seat. ii) A sliding groove is provided on the side of the square shell to limit the movement range of the button assembly and also limit the movement range of the inner core structure, ensuring that when the car encounters sudden danger, the inner core structure will not separate from the square shell due to sudden impact, preventing secondary injury to children. Description of the Drawings

[0025] Figure 1 Schematic diagram of a guide rail structure fixed on a child seat according to an embodiment of the present utility model;

[0026] Figure 2 Axial sectional view of the guide rail structure fixed on a child seat according to an embodiment of the present utility model;

[0027] Figure 3 Bottom view of the guide rail structure fixed on a child seat according to an embodiment of the present utility model;

[0028] Figure 4 Schematic diagram of the inner core of the guide rail structure fixed on a child seat according to an embodiment of the present utility model;

[0029] Figure 5 Schematic diagram of the pull rod of the guide rail structure fixed on a child seat according to an embodiment of the present utility model;

[0030] Figure 6 Internal top view of the guide rail structure fixed on a child seat according to an embodiment of the present utility model.

[0031] Explanation of reference numerals:

[0032] 100 - Guide rail structure; 110 - Square shell; 111 - Slide groove; 112 - Opening; 120 - Inner core structure; 121 - Inner core housing; 121a - First notch; 121b - Second notch; 122 - Inner core; 122a - First hole; 122b - Second hole; 122c - Third hole; 122d - Fourth hole; 122e - Fifth hole; 122f - Sixth hole; 130 - Button structure; 131 - Button; 132 - Twisting sleeve; 133 - Twisting cover; 140 - Pull rod; 141 - Barbs; 142 - Pressure piece; 143 - First sliding hole; 144 - Second sliding hole; 145 - Third sliding hole; 146 - Fourth sliding hole; 147 - Convex column; 150 - Snap; 151 - Through hole; 160 - Lock; 161 - Lock opening; 162 - Top plate; 170 - Tension spring; 180 - Positioning member; 181 - First positioning member; 182 - Second positioning member; 183 - Third positioning member; 184 - Fourth positioning member; 185 - Fifth positioning member; 190 - Limiting plate; 191 - Protrusion; 192 - Limiting groove; 193 - Fifth sliding hole; 194 - Pressure spring. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present utility model.

[0034] See Figure 1 、 Figure 2 、 Figure 3 As shown in

[0035] In this embodiment, a square shell 110 is installed outside the guide rail structure 100, and an inner core structure 120 is arranged inside. The button assembly 130 is installed on the inner core structure 120, and the left and right movement of the inner core structure 120 is controlled through the chute 111 on the side of the square shell 110, ensuring that the inner core structure 120 is controlled to move within a certain range, and ensuring the safety and stability of the axial direction of the child seat; a first notch 121a is provided on the surface of the inner core structure 120, ensuring that the buckle 150 inside the pull rod 140 extends out of the first notch 121a and catches the square shell 110, preventing the inner core structure 120 from retracting into the square shell 110, ensuring that when an accident occurs in the vehicle, the inner core structure 120 will not retract into the square shell 110 due to the impact of the accident, improving the stability of the square shell 110 and the inner core structure 120, and avoiding secondary displacement of the child safety seat after impact and causing secondary injury to the child.

[0036] Specifically, a buckle 150 is provided in the middle of the pull rod 140. When the inner core structure 120 extends out of the square shell 110 to the maximum distance, the buckle 150 extends out of the first notch 121a on the surface of the inner core structure 120 and engages with the square shell 110 to fix the inner core structure 120 and prevent the inner core structure 120 from retracting into the square shell 110.

[0037] See Figure 2 、 Figure 4, a pair of sliding holes are provided on two side walls of the pull rod 140, including a first sliding hole 143 and a second sliding hole 144; two positioning members 180 connected to the inner core structure are provided in the pair of sliding holes, including a first positioning member 181 and a second positioning member 182; wherein the first positioning member 181 passes through the first sliding hole 143, and the second positioning member 182 passes through the second sliding hole 144.

[0038] In this embodiment, the first sliding hole 143 and the second sliding hole 144 are provided on two side walls of the pull rod, saving the use space of the pull rod 140; the first positioning member 181 and the second positioning member 182 corresponding to the connection with the inner core 122 are provided in the pair of sliding holes, ensuring that the pull rod is stably fixed on the inner core structure 120 during operation, and preventing the pull rod 140 inside the inner core structure 120 from detaching from the inner core structure 120 when the external force suddenly increases, resulting in the failure of the guide rail structure 100 on the child seat.

[0039] Specifically, the middle part of the pull rod 140 is hollow between two side walls, and a pair of sliding holes are provided on the two side walls. The first sliding hole 143 is in a long strip shape for the first positioning member 181 to move inside; the second sliding hole 144 is in an inverted triangle shape for the second positioning member 182 to move inside. A first hole 122a for the first positioning member 181 to pass through is provided on the inner wall of the inner core 122, and the first hole 122a is circular; a second hole 122b for the second positioning member 182 to pass through is provided, and the second hole 122b is in a long strip shape for the second positioning member 182 to move up and down.

[0040] Preferably, the positioning member 180 can be a pin.

[0041] See Figure 2 , Figure 5 , the first positioning member 181 and the second positioning member 182 pass through the buckle 150 to restrict the movement of the buckle 150.

[0042] In this embodiment, through holes 151 are provided on the surface of the buckle 150 inside the pull rod 140 for the first positioning member 181 and the second positioning member 182 to pass through, restricting the buckle 150 from moving along with the movement of the pull rod 140; the first positioning member 181 and the second positioning member 182 pass through the buckle 150 and are controlled within the first sliding hole 122a and the second sliding hole 122b, restricting the relative movement of the buckle 150 within the first sliding hole 122a and the second sliding hole 122b.

[0043] Specifically, two through holes 151 for the first positioning member 181 and the second positioning member 182 to pass through are provided on the surface of the buckle 150. The two positioning members 180 pass through the buckle 150, restricting the buckle 150 between the two side walls in the middle of the pull rod 140 and making it move relatively along with the movement of the pull rod.

[0044] See Figure 2, there are pressing pieces 142 provided on the two side walls of the pull rod 140, and the pressing pieces 142 control the buckle 150 to extend out of the first notch 121a.

[0045] In this embodiment, the pressing pieces 142 provided on the two side walls of the pull rod 140 are elastic. One end is provided on the pull rod 140, and the other end is in contactless state, abutting against the buckle 150. To control the extension or retraction of the buckle 150, such a setting saves the space of the pull rod 140.

[0046] Specifically, there are pressing pieces 142 provided between the two side walls in the middle of the pull rod 140. The pressing pieces 142 have a certain elasticity. One end of the pressing piece 142 is connected to the middle of the pull rod 140, and the other end abuts against the buckle 150 to control the extension or retraction of the buckle 150. The end of the pressing piece 142 connected to the middle of the pull rod 140 is higher than the end abutting against the pressing piece 142. The pressing piece 142 droops downward due to gravity, giving the buckle 150 a downward acting force.

[0047] See Figure 2 、 Figure 4 , there are a pair of sliding holes provided on the two side walls of the pull rod 140 near one end of the button assembly 130, including a third sliding hole 145 and a fourth sliding hole 146; there are two positioning members connected to the inner core structure 120 provided in the pair of sliding holes, including a third positioning member 183 and a fourth positioning member 184; wherein the third positioning member 183 passes through the third sliding hole 145, and the fourth positioning member 184 passes through the fourth sliding hole 146.

[0048] In this embodiment, there are a pair of sliding holes provided on the two side walls at the end of the pull rod 140, saving the usage space of the pull rod 140; there are two corresponding positioning members 180 connected to the inner core 122 provided in the pair of sliding holes, ensuring that the pull rod 140 is stably fixed on the inner core structure 120 during operation, and preventing the pull rod 140 inside the inner core structure 120 from detaching from the inner core structure 120 when the external force suddenly increases, resulting in the failure of the guide rail structure 100 on the child seat.

[0049] Specifically, the middle between the two side walls at the end of the pull rod 140 is hollow, and there are a pair of sliding holes provided on the two side walls. The third sliding hole 145 and the fourth sliding hole 146 are in the shape of the same long strip for the third positioning member 183 and the fourth positioning member 184 to move inside. The third sliding hole 145 and the fourth sliding hole 146 are arranged vertically. There are a third hole 122c for the third positioning member 183 to pass through and a fourth hole 122d for the fourth positioning member 184 to pass through provided on the inner wall of the inner core structure 120. Both the third hole 122c and the fourth hole 122d are circular.

[0050] See Figure 2 、 Figure 5, between the two side walls of the end of the pull rod 140 close to the button assembly 150, a limiting plate 190 is provided. A fifth sliding hole 193 is provided on the limiting plate 190. The third positioning member 183 and the fourth positioning member 184 pass through the fifth sliding hole 193. A protrusion 191 and a limiting groove 192 are provided on the limiting plate 190; between the two side walls of the end of the pull rod 140 close to the button assembly 150, a convex column 147 is provided, and the convex column 147 cooperates with the limiting groove 192.

[0051] In this embodiment, the limiting plate 190 is arranged between the two side walls at the end of the pull rod 140. The two positioning members 180 pass through the three sliding holes at the end of the pull rod 140 to limit the moving space of the limiting plate 190 and ensure the radial stability of the limiting plate 190; the convex column 147 cooperates with the limiting groove 192 to control the limiting plate 190, and the limiting plate 190 controls the protrusion 191 at the upper end of the limiting plate 190 to move accordingly, ensuring that the pull rod 140 completely controls the movement of the limiting plate 190.

[0052] Specifically, a limiting plate 190 is arranged between the two side walls at the end of the pull rod 140. The inside of the limiting plate 190 is provided with a long-strip-shaped fifth sliding hole 193 for the third positioning member 183 and the fourth positioning member 184 to move up and down. The top of the limiting plate 190 is provided with a protrusion 191 and a limiting groove 192. The limiting groove 192 cooperates with the convex column 147 between the two side walls at the end of the pull rod 140 to control the up and down movement of the limiting plate 191, and the movement of the limiting plate 190 controls the protrusion 191 at the upper end of the limiting plate 190 to move accordingly.

[0053] See Figure 1 、 Figure 2 , the inner core structure 120 includes: an inner core housing 121, a second notch 121b is provided on the inner core housing 121, and the inner core housing 121 is arranged in the square shell 110; an inner core 122, and the inner core 122 is arranged in the inner core housing 121; wherein the protrusion 191 extends out of the second notch 121b.

[0054] In this embodiment, a second notch 121b is provided at the top of the inner core housing 121 for the protrusion 191 to extend out, clamping the square shell 110 to improve the safety and stability of the child safety seat.

[0055] Specifically, a row of openings 112 is provided on the upper surface of the square shell 110, a second notch is provided on the upper surface of the inner core housing, and the movement of the pull rod 140 controls the protrusion 191 to extend out of the inner core housing 121 and cooperate with a row of openings 112 on the surface of the square shell 110 to fix the inner core structure 120.

[0056] See Figure 2 、 Figure 5 , the limiting plate 190 includes a compression spring 194, and the compression spring 194 is arranged between the limiting plate 194 and the inner core 122.

[0057] In this embodiment, the compression spring 194 further restricts the movement of the limit plate 190, preventing the protrusion 191 on the limit plate 190 from protruding out of the second notch 121b when the inner core structure 120 moves, and improving the stability control of the limit plate 190.

[0058] Specifically, the compression spring 194 restricts the movement of the limit plate 190. One end of the compression spring 194 contacts the limit plate 190, and the other end contacts the inner surface of the inner core 122.

[0059] See Figure 6 , the button assembly 130 includes: a torsion sleeve 132, the torsion sleeve 132 is arranged on the inner core housing 121; a button 131, the button 131 is arranged in the torsion sleeve 132, and the button 131 is connected to one end of the pull rod 140 close to the button assembly 130; a torsion cover 133, the torsion cover 133 is arranged on the torsion sleeve 132.

[0060] In this embodiment, the button 131 and the torsion sleeve 132 in the button assembly 130 control different components respectively to avoid confusion in controlling components and interfering with the movement of other components.

[0061] Specifically, the torsion sleeve 132 is fixed on the inner core housing 121, and the button 131 is connected to the end of the pull rod 140. When the button assembly 130 is moved, pressing the button 131 controls the movement of the pull rod 140, and the torsion sleeve 132 controls the movement of the inner core structure 120.

[0062] See Figure 5 , a top plate 162 is provided at one end of the pull rod 140 away from the button assembly 130. The top plate 162 passes through the pull rod 140 and abuts against the latch 160. A tension spring 170 is provided on the latch 160, and the other end of the tension spring 170 is connected to the barb 141 at the front end of the pull rod 140.

[0063] In this embodiment, the latch 160 cooperates with the components in the rear seat of the car. The latch 160 locks to fix the child safety seat on the seat, improving the stability and safety of the child seat in the face of emergencies.

[0064] Specifically, the latch 160 fastens the components in the car seat, the tension spring 170 on the latch 160 is tightened, and the fifth positioning member 185 passes through the latch 160 and is arranged on the wall of the inner core 122. A top plate 162 that can move back and forth is provided on the inner core 122. The top plate 162 passes through the front end of the pull rod 140. When the pull rod 140 moves backward, the top plate 162 follows and moves backward. The latch 160 loses its abutment and rotates backward around the fifth positioning member 185 following the tension spring 170, and the latch opening 161 faces outward.

[0065] The problem solved by the present utility model is how to solve the problem of the retraction of the inner core structure when the inner core structure extends out of the square shell. When the inner core structure 120 is to extend to the maximum distance, the button 131 is pressed, and the button 131 drives the pull rod 140 to move backward. The third positioning member 183 and the fourth positioning member 184 drive the limit plate 190 to move forward. The convex column 147 between the limit groove 192 on the limit plate 190 and the two side walls at the end of the pull rod 140 is engaged, and the convex column 147 presses the limit plate 190 to move downward. The limit plate 190 moving downward compresses the compression spring 194, and the protrusion 191 on the limit plate 190 retracts into the second notch 121b; the pull rod 140 moves backward, and the second positioning member 182 moves downward along the edge of the second sliding hole 144, and the first positioning member 181 moves forward in the first sliding hole 143. Therefore, the buckle 150 is driven to move forward by the two positioning members 180. The upper end of the buckle 150 is pressed by the pressing piece 142, so that the buckle 150 extends out of the first notch 121a and abuts against the square shell 110; the pull rod 140 moves backward and the cross plate moves backward, and the tension spring 170 pulls the lock 160, so that the lock 160 rotates backward, and the lock opening 161 faces outward; the torsion sleeve 132 is pushed forward, and the inner core structure 120 extends out of the square shell 110. The button 131 is released, the pull rod 140 moves forward, the limit plate 190 moves upward, and the protrusion 190 extends out of the second notch 121b to limit the square shell 110 to form a lock; the restriction of the buckle 150 disappears, the inner core structure 120 extends out and engages with the square shell 110, and the external force cannot retract it. The tension spring 170 retracts to restore the lock 160 to lock the components in the vehicle seat. When retraction is required, the button 131 is pressed, the limit plate 190 moves downward, and the protrusion 191 retracts into the second notch 121b; the first positioning member 181 moves forward along the first sliding hole 143, and the second positioning member 182 moves upward along the edge of the second sliding hole 144. The pressing piece 142 is pushed up by the external force, and the buckle 150 retracts into the first notch 121a; the pull rod 140 moves backward, and the tension spring 170 releases the lock of the lock opening 161 on the vehicle seat component; the torsion sleeve 132 moves backward, and the inner core structure 120 retracts into the square shell 110.

[0066] Although the present utility model is disclosed as above, the present utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the scope defined by the claims.

Claims

1. A guide rail structure fixed on a child seat, characterized in that: include: A square shell, wherein a slide groove is provided on the side of the square shell; An inner core structure, wherein the inner core structure is provided with a first notch and the inner core structure is arranged in the square shell; A button assembly, the button assembly is arranged on the inner core structure, and the button assembly moves through the slide groove; A pull rod, the pull rod is arranged in the inner core structure, and the pull rod is provided with a buckle; The inner core structure extends out of the square shell, and the buckle extends out of the first notch to clamp the square shell and restrict the movement of the inner core structure.

2. The guide rail structure fixed on the child seat according to claim 1, characterized in that: A pair of sliding holes are provided on the two side walls of the pull rod, including a first sliding hole and a second sliding hole; The slide hole is provided with two positioning members connected to the inner core structure, including a first positioning member and a second positioning member; The first positioning member passes through the first sliding hole, and the second positioning member passes through the second sliding hole.

3. The guide rail structure fixed on the child seat according to claim 2, characterized in that: The first positioning member and the second positioning member pass through the buckle to limit the movement of the buckle.

4. The guide rail structure fixed on the child seat according to claim 3, characterized in that: A pressing sheet is provided between the two side walls of the pull rod, and the pressing sheet controls the buckle to extend out of the first notch.

5. The guide rail structure fixed on the child seat according to claim 1, characterized in that: A pair of sliding holes are provided on the two side walls of the pull rod close to one end of the button assembly, including a third sliding hole and a fourth sliding hole; Two positioning members connected to the inner core structure are provided in the sliding hole, including a third positioning member and a fourth positioning member; The third positioning member passes through the third sliding hole, and the fourth positioning member passes through the fourth sliding hole.

6. The guide rail structure fixed on the child seat according to claim 5, characterized in that: A limit plate is provided between the two side walls of the pull rod close to one end of the button assembly, a fifth sliding hole is provided on the limit plate, the third positioning member and the fourth positioning member pass through the fifth sliding hole, and a protrusion and a limit groove are provided on the limit plate; A convex column is provided between the two side walls of the pull rod close to one end of the button assembly, and the convex column cooperates with the limiting groove.

7. The guide rail structure fixed on the child seat according to claim 6, characterized in that: The inner core structure comprises: An inner core shell, wherein a second notch is provided on the inner core shell, and the inner core shell is arranged in the square shell; An inner core, the inner core being disposed in the inner core shell; The protrusion extends out of the second notch.

8. The guide rail structure fixed on the child seat according to claim 7, characterized in that: The limiting plate comprises a compression spring, and the compression spring is arranged between the limiting plate and the inner core.

9. The guide rail structure fixed on the child seat according to claim 7, characterized in that: The button assembly comprises: A torsion sleeve, the torsion sleeve is arranged on the inner core shell; A button, the button being arranged in the torsion sleeve and connected to one end of the pull rod close to the button assembly; The twist cover is arranged on the twist sleeve.

10. The guide rail structure fixed on a child seat according to claim 1, characterized in that: A top plate is provided at one end of the pull rod away from the button assembly. The top plate passes through the pull rod and abuts against a lock. A tension spring is provided on the lock, and the other end of the tension spring is connected to a barb at the front end of the pull rod.

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